Step-by-step explanation:
5x+3y = 12 ...1
4x-5y = 17 ...2
...1 × 5 both sides of the equation
25x + 15y = 60 ...3
...2 × 3 both sides of the equation
12x - 15y = 51 ...4
...3 + ...4
25x + 15y + 12x -15y = 60+51
37x = 111
x = 111/37 = 3
replace x = 3 in ...1
y = .......
What is the value of the expression 25 ÷ 5 + (6 x 2) − 4?
Question 1 options:
7
9
12
13
Answer:
13
Step-by-step explanation:
25 / 5 + 12 - 4 = 5 + 12 - 4 = 17 - 4 = 13
f(x)=-4x+2 what is the answer
Please help.
Is algebra.
Answer:
bcd
Step-by-step explanation:
They are two parallel lines, having the same slope, there is no solution since the lines never cross
S а о -3 S - 14 2 -S # -3 -2 1+ A + Lovezujo edos e seu molaguude 16 avuq UUDIUM
Answer:
Line Q is the line with the slope of 0.
Step-by-step explanation:
It does not increase or decrease.
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Answer:
yasghfeiruhiurgwhruihrgrgrgh
Step-by-step explanation:
rhewrgbwjyefjyewhuyfgeurghguhgggggg
Answer:
Let the price of the garden table be x.
The bench would cost x-77 dollars.
x+x-77=777
2x-77=777
2x=854
x=427
The bench costs 350 dollars.
Let me know if this helps!
Valley Mills Sports Center has a total of 318 footballs and basketballs. There are 76 more footballs for sale than basketballs.
How many footballs are for sale?
A. 121
B. 176
C. 197
D. 242
The number of footballs that are for sales when its known that there are total 318 footballs and basketballs and there are 76 more footballs for sale than basketballs, is given by: Option C: 197
How to form mathematical expression from the given description?You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
Given that:
Total number of basketballs and footballs in the considered sports center = 318 (assuming they're for sales, as rest of the question is talking about footballs and basketballs being for sales)Number of footballs = 76 + Number of basketballsAssume that:
Number of footballs = xNumber of basketballs = yThen we get two equations, as:
[tex]x+y = 318\\x = 76 + y[/tex]
Substituting the variable x in first equation by the expression obtained in second equation for x, we get:
[tex]x + y = 318\\(76 + y) + y = 318\\76 + 2y = 318\\\text{Subtracting 76 from both the sides}\\\\2y = 318 - 76 = 242\\\\\\2y = 242\\\\\text{Dividing both the sides by 2}\\\\y = \dfrac{242}{2} = 121[/tex]
Thus, we got: Number of basketballs = y = 121
Using this result and the first equation, we get:
[tex]x + 121 = 318\\x = 318 - 121 = 197[/tex] = number of footballs.
Thus, the number of footballs that are for sales when its known that there are total 318 footballs and basketballs and there are 76 more footballs for sale than basketballs, is given by: Option C: 197
Learn more about forming equations here:
https://brainly.com/question/11938672
Learn more about system of linear equations here:
https://brainly.com/question/13722693
#SPJ2
Use the given information to write the equation of a line.
slope = -2 and passes through through (1,1)
Answer:
y = -2x - 1
Step-by-step explanation:
If you already know the slope. Just find out the y-intercept. Plug the coordinates into the equation.
y = mx + b
y = -2x + b
1 = -2(1) + b
1 = -2 + b
-1 = b
help me I'm under the water (っ◔◡◔)っ ❤
Answer:
D I think
Step-by-step explanation:
A reflection y line
Geometry! Easy! Full points! One question!
Answer:
144 in.²
Step-by-step explanation:
A triangle has side lengths of (8w-5)(8w−5) centimeters, (9w-6)(9w−6) centimeters, and (3x-7)(3x−7) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?
a. 6w-4x
b. −11−4x+17w
c. 3x+17w−18
d. 3w+3−4x
Answer:
The answer is 3x + 17w - 18
Given: EFGH is a square
Find the length of FH.
Answer:
B) 3√2
Step-by-step explanation:
FH = √GH²+FG² = √18 = 3√2
help i have no idea
Answer:
9
the triangle is isosceles due to base angles being congeuent
Answer: 9
Step-by-step explanation: there equal
Work out the volume of this cylinder? 28mm height and 30mm base. Who answers this early and first is the brainliest
Answer:
19,792.0mm³
Step-by-step explanation:
π×radius²×height
π×15²×28=19792.03372 rounded to 1dp would ne
19,792.0mm³
the diameter is 30, which is also the base divide by two which makes 15 which will be your radius of your circle.
JUST ANSWER RIGHT NOTHING ELSE 25 POINTS!!! plEase thank you
Answer:The heck i aint on that im close though
Step-by-step explanation:
HELP PLEASE MATH! ( please show work )
Answer:
the eagles nest is 30 cm above the ground because as you can see at the bottom of the tree its 30 degrees so since it has equal sides both of thoses sides would be 30, and as we can see it marks the nest exactly where it ends, thus, its 30 cm above the ground. pls mark me brainliest if you want a visual too ;)
Karen had 7 items in her shopping cart with different prices. Her mean cost of these items was $4.02. At the register, she added a package of gum for $1.99. Choose ALL statements about how the price of the gum will affect the mean and median of the items she purchased.
A. the mean will decrease
B. the mean will increase
C.the median will decrease
D the median will increase
E the mean will decrease and increase.
Answer:
the answer is D
Step-by-step explanation
if your adding more stuff to your shopping cart it does not matter what item it is it will always increase
i dont what is the perimeter?
Answer:
20.4
Step-by-step explanation:
Formula is P=2L+2W so 7(2) + 3.2 (2) = 20.4
Answer:
20.4 inches
Step-by-step explanation:
(7x2) + (3.2x2) = 20.4
Have a great day <3
Find the equation of the line passing through the given points, (1,5) and (2, 7). Which
formula should you use first?
Madeline is saving up to buy a new jacket. She already has $40 and can save an
additional $8 per week using money from her after school job. How much total
money would Madeline have after 10 weeks of saving? Also, write an expression that
represents the amount of money Madeline would have saved in w weeks.
write the equation of the line parallel to the given line p (2,-3) y=-6x+10
Answer:
Step-by-step explanation:
y+3 = -6(x-2)
2y = x - 4
4x + 3y = 5
Answer:
x=2 and y=−1
Step-by-step explanation:
Let's solve your system by substitution.
4x+3y=5;2y=x−4
brainliest please?
Answer:
The answer to the system of equations is x = 2 and y = -1
Step-by-step explanation:
We can substitute the variables and see how they work with the equations.
2 (-1) = (2) - 4
-2 = 2 - 4
-2 = -2
4 (2) + 3 (-1) = 5
8 + (-3) = 5
8 - 3 = 5
5 = 5
Hope This Helps!
Helpp plzzz I will mark brainliestttt
Answer:
294
Step-by-step explanation:
We are given the area of 1 face of a cube. The area is 49. Now if their are 6 faces in a cube, and all faces of a cube are the same, then we multiply 49*6 = 294.
P.S. I don't understand the boxes thing but I have the answer :)
PLSSSSSSSSS HELPP ILL MARK BRAINLIEST
Answer:
47
Step-by-step explanation:
yep help me again lol.
Answer:
C
Step-by-step explanation:
A recent increase in sales of microchips has forced a computer company to buy a new processing machine to help keep up with demand. The builders of the new machine claim that it produces fewer defective microchips than the older machine. From a random sample of 90 microchips produced on the old machine, 5 were found to be defective. From a random sample of 83 microchips produced on the new machine, 3 were found to be defective. The quality control manager wants to construct a confidence interval to estimate the difference between the proportion of defective microchips from the older machine and the proportion of defective microchips from the new machine.
The final question is;
Why is it not appropriate to calculate a two-sample z-interval for a difference in proportions?
Answer:
The normality of the sampling distribution of the difference in sample proportions cannot be established.
Step-by-step explanation:
To use the two-sample z-interval for a difference in proportions, some conditions must be met which help us to know the normality of the distribution.
The conditions are;
- The method of sampling for each population must be simple random sampling.
- The samples must be independent.
- Each sample must include at least 10 successes and 10 failures.
- Each population must be a minimum 20 times its sample.
In this case, we are not given the population size and as such we cannot ascertain the last condition I wrote above since the sample proportion we are given alone isn't sufficient. Also, they both don't include at least 10 failures. Thus the normality of the sample proportions cannot be established.
Answer: the normality of the sampling distribution of the difference in sample proportions cannot be established
Step-by-step explanation:
Find the value of x.
**
Please help!!
Which of the following functions is graphed below
Answer:
A bc the y-intercept is -6
Step-by-step explanation:
Simplify.
7x² - x + 9
+ 6x² + 5x - 10
___________
Will give brainliest
Answer:
13x^2+4x-1
Step-by-step explanation:
1) Which expression is equivalent to -8(-4y + 6x)?
a. 32y+(-48x)
b. -32y+48x
c. -12y+14x
d. -12y+(-14x)
Answer:
its AAAA
Step-by-step explana
plz like and rate plzzz thank you
What value of w that makes the equation true 2/3(w+3) = 7